Why Do We Draw Pointy Stars?

Here's a deep question: When we draw a star, why do we draw it with points, even when we know spheres don't have points? It's a question I hadn't thought to ask, and the answer frankly surprised me; the super-short version is that we see them as pointy, due to various optical properties. Set aside three minutes for Minute Physics to explain:

Minute Physics also points to this research paper (PDF) entitled Shape of stars and optical quality of the human eye, which is full of interesting illustrations. Note: please do not shine lasers into your eyes in order to test this; squinting is acceptable. Thank you.

Also on Mental Floss:

DID YOU KNOW? Marlon Brando hated memorizing lines so much that he posted cue cards everywhere to help him get through scenes.
He even asked for lines to be written on an actress's posterior. (That request was denied.)